ER65 - Mini Rack Controller Electronic Refrigeration Line

Transcription

1 PB_ER65_ 00 ER65 - Mini Rack Controller Electronic Refrigeration Line Device is a multi-stage digital controller. It is typically applied to small refrigeration rack units piloting compressors or condenser fans It incorporates control loops that sequence on-off stages and can pilot a proportional device (i.e. fan speed driver). Controls are processed by temperature or pressure sensing the refrigerant variations Device is configurable and allows facing a large number of units within the limit of 4 stages. It includes additional features as alarm history page, run time counters for maintenance operations and communication capability to be connected to a monitoring system. Physical Features Robust front panel for durability and long term usage Removable plug connectors for quick mounting and wiring Direct 30V supply: no external transformer required Embedded RS485 (Modbus or N open): no additional communication card required Selectable input: pressure or temperature Application Features Controls: On-off and proportional Flexible sequencer including optimization (i.e. rotation) Maintenance: run time counters, alarm history, Sensor monitoring: minimum and maximum peaks

2 PB_ER65_ 00 Dimensions in mm

3 PB_ER65_ 00 3 Wirings 4 ALR 7()A DI3 DI4 DI5 L N 8 7 OUTPUTS 5()A PWM V IN V P -T DI DI POWER Communication wirings N OPEN MODBUS CABLE ACCESSORY Rt Rt - Com Rt Rt - 50 cm Rt (blue) 4 - Rt- (white) 7 - Com (black) ER-COM-

4 4 PB_ER65_ 00 Functions Device Features Description Direct Power Supply Devices are powered directly with 30 VAC RS485 Communication Port Keyboard Lock RS485 communication port supports N open or Modbus protocols (see product ordering codes). Port is used for commissioning operations and integration to monitoring systems Display can be locked in order to prevent user to change parameter settings. When locked, only user information is available Pressure or Temperature Control Pressure or temperature inputs can be alternatively selected as control process variable Sequencer Device includes several strategies to sequence the outputs, from fixed sequence to optimization options like rotation or load manager OUT 4 stages relays Device manages to 4 compressors or fans OUT Auxiliary Relays Dedicated relays is available to manage alarm reporting OUT Analogue Output PWM output is also available to pilot speed driver IN Multifunction Inputs (DI to DI5) Monitoring (Min/Max) Configurable digital inputs are available to manage remote contacts such generic alarm, standby or nd setpoint or circuit alarms such high pressure, low pressure, oil or liquid alarms Device monitors periodically the current sensor value and memorizes the minimum and maximum peaks. Peaks values are visualized on display info menu Control Features Dead Band Control Sequence strategy PI control Alarm Management Description See detailed description hereafter

5 PB_ER65_ 00 5 Process Variable Control process variable can be selected between temperature and pressure. Display shows both pressure and temperature by applying refrigerant conversion curves. Dead Band Control Control is based on a neutral zone where control action is frozen. Control is activated again if the process variable moves outside this band. Outputs are started if the process variable moves above the dead band. Outputs are stopped if the process variable moves below the dead band. Two separated parameters define the dead band zone around the setpoint. It is then possible to have different start and stop action. Process Variable Start Zone Upper Dead band Neutral Zone - Lower Dead band Time Stop Zone

6 6 PB_ER65_ 00 5 is blocked between minimum and maximum values to limit user setpoint adjustment. A second setpoint can be defined to save energy during night or reduced load periods. Periods are defined manually from display/network or from external digital input command. limits Maximum setpoint Alternative Selection (option) Normal setpoint Alternative Minimum setpoint or IN Output Timers Start Up timer Timer is applied at device power up. All outputs are delayed. It allows preheating the compressor crankcase before any control operations. Process Variable Control Enable Time Start-Stop timers Power up Timers are applied between the outputs. It prevents from activating or deactivating next output if not required. Process Variable Time Start Delay Stop Delay Output Output

7 PB_ER65_ 00 7 Output Sequencer Control sequence manages up to 4 outputs. Output Capacity Each ouput is associated with a capacity expressed in % of the total power equipment load. Capacity parameter (OCx on the display) is set to 0 if the output is not used. Example: Compressor - 5kW Capacity = 50% Compressor - 5kW Capacity = 50% Sequence Strategy Sequential: outputs are sequentially activated according to a fixed order (First In Last Out). PV 4 3 SEQUENTIAL 4 3 Rotation: outputs are sequentially activated but the ordering depends on the running time of each output. It is particularly suitable for outputs with same capacity. PV 3 4 ROTATION 4 3 Load optimization: the sequencer selects the number of outputs according to the requested load. It is suitable when outputs have different capacities PV LOAD OPTIMIZATION

8 8 PB_ER65_ 00 Sequence Setting Examples Example : compressors with rotation strategy Setup Table Parameter Value Compressor OC 33% Compressor OC 33% Compressor 3 OC3 33% Sequencer CM ROT Example : compressors with different capacities Setup Table Parameter Value Compressor OC 50% Compressor OC 5% Compressor 3 OC3 5% Sequencer CM PO Example 3: semi-hermetic compressor with one stage (normally closed valve) Setup Table Parameter Value Compressor OC 00% Stage OC - Sequencer CM SEN Example 4: semi-hermetic compressor with two stages (normally opened valves) Setup Table Parameter Value Compressor OC 00% Stage OC - Stage OC3 - Sequencer CM SEN Example 5: condensing unit Setup Table Parameter Value Fan OC 5% Fan OC 5% Fan 3 OC3 5% Fan 4 OC4 5% Sequencer CM SEN

9 PB_ER65_ 00 9 Analog Control Proportional-Integral (PI) control loop can be activated to pilot an analogue output (PWM). It is particularly applied to pilot unit with fan speed driver. Analogue Output 0% Proportional band Process Variable Time Counter A counter is associated to each output. Running hours are memorized by the device and visualized from the display. A threshold value can be set in order to produce an alarm for maintenance operation. Process Variable Time Stage Status Standby mode Unit can be fully stopped by standby commands available on display front panel or wired remote switch.

10 0 PB_ER65_ 00 Alarm Management Table sums up all the alarms managed by the devices Name Input Output High alarm Sensor No action on control - Alarm output activated Low Alarm Sensor No action on control - Alarm output activated General alarm Digital input All control outputs off - Alarm output activated High pressure Digital input Specific action (see parameters DxA) - Alarm output activated Low pressure Digital input Specific action (see parameters DxA) - Alarm output activated Oil pressure Digital Input Specific action (see parameters DxA) - Alarm output activated Liquid pressure Digital Input Specific action (see parameters DxA) - Alarm output activated Maintenance Digital Input No action on control - Alarm output activated Sensor Failure Sensor All control outputs off - Alarm output activated Sensor alarm Alarm is detected if control sensor moves outside low and high thresholds. Alarm activation could be delayed in order to consider temporary fluctuations due to specific operations such start up. Thresholds are independent from the setpoint (absolute alarm). Alarm situation is ending when temperature turns back between low and high thresholds. Process Variable High Limit Low Limit Alarm status On Off Time Alarm Outputs Alarms are reported on display front panel LED, internal buzzer or auxiliary output. Alarm is reset automatically or manually. Acknowledge action from display front panel is necessary if manual reset has been selected. Alarm Activation Manual reset Display alarm LED Internal Buzzer (option) OUT Auxiliary Relays Alarm History Device is able to memorize last 0 alarms. History is available on alarm display page.

11 PB_ER65_ 00 Alarm LED Bar Pressure LED: on when pressure value is displayed C Temperature LED: on when temperature value is displayed % Ouput load LED: on when load is displayed Display layout h or x000 Output counter indication LED LED ON when counter in hour is displayed LED BLINKS when counter in x000 hours is displayed Display Menus a). Home a). Home b.) SETPOINT >5 b.) STANDBY >5 c.) CONFIGURATION c.) ALARM MUTE/RESET d.) INFO Function Keys e.) ALARM HISTORY Menus Navigation f.) Escape * * Automatic ESCAPE after 30 sec.... Counter/Min/Max Reset Setting 5 Parameters Setting

12 PB_ER65_ 00 Info Menu Code Description OUTx Status of the outputs with run time counter values x= to 4 SP ASP Alternative (if applicable) IHI Monitored highest peak, sensed on the control sensor ILO Monitored lowest peak, sensed on the control sensor LOC Keyboard lock parameter Status Counter (hours) Messages and Error Codes Code Description Action OR Control sensor failure To check sensor wiring or to replace it HP High pressure alarm To check refrigerant circuit LP Low pressure alarm To check refrigerant circuit OIL Oil pressure/level alarm To check refrigerant circuit LL Liquid level alarm To check refrigerant circuit ALR General alarm To check plant MTN Maintenance alarm To plan maintenance operations OFF Standby To restart unit with keyboard or Digital Input HI LO High alarm Low alarm To check plant (abnormal control sensor deviation) Counter (x000 hours) Output Visualization Menu Code SP ASP Description Alternative (if applicable) 3 csp: ASP: Alternative setpoint Manual Selection Alarm History Menu Code SP ASP Description Alternative (if applicable)

13 PB_ER65_ 00 3 Configuration Menu Code Default Range Description Sensor Management INP -P -P / -T Control sensor selector: -P: pressure sensor selected -T:temperature sensor selected MPI 4mA 0mA, 4mA Pressure sensor type: 0mA: 0-0 ma type 4mA: 4-0 ma type RLO - - to RHI bar Pressure sensor low range RHI 45 RLO to 45 bar Pressure sensor high range OS 0 - / bar or C Control sensor offset REF 404, 507,, 34 Refrigerant type: R404a, R507, R, R34a Settings SPL / SPH Low Limit SPH 35 SPL / 0 C High Limit CSP 3.5 SPL to SPH ASM NON NON, MAN, DI Alternative setpoint selector: NON: not used MAN: manual (display/network) DI: digital input ASP 5 SPL to SPH Alternative setpoint Control Settings DBL - -0 / 0 bar or C Output control: lower dead band DBH 0 / 0 bar or C Output control: upper dead band LON 0 0 / 50 sec Output control: inter-stage on delays LOF 0 0 / 50 sec Output control: inter-stage off delays SON 5 0 / 50 sec Output control: internal stage on delays SOF 5 0 / 50 sec Output control: internal stage off delays PB 0 0 / 0 bar or C Analogue control: proportional band IT 0 0 / 50 sec Analogue control: integral time DxM NON Digital Input Settings (x= to ) NON, SBY, ASP, ALR DxC CLS OPN, CLS DxM NON Digital input selector NON = Not used SBY = standby ASP = alternative setpoin ALR = generic alarm (interlock) Digital input polarity OPN= contact active on opening CLS= contact active on closing Digital Input Settings (x= 3 to 5) NON, HP, LP, OIL, LL, ALR DxC CLS OPN, CLS DxD 5 0 /0 min Alarm delay DxA DSP DSP, SAR, SMr Digital input selector Non = Not used HP = high pressure alarm LP = low pressure alarm OIL= oil low pressure alarm LL= liquid low alarm ALR= generic alarm Digital input polarity OPN= contact active on opening CLS= contact active on closing Alarm function DSP: only alarm displaying SAR: scaling down (see SCD parameter) automatic reset alarm SMR: interlock, manual reset alarm Other Settings MTC 0 0 / 600 (x00 hours) Maintenance threshold alarm SB YES NO, YES Standby key enable TLD 5 / 30 min Monitoring period SND NO NO, YES Alarm buzzer enable ADR / 55 Network address CM SEN ROT, SEN, PO OCx 5 - / 00 % Output Settings (x= to 4) Sequence strategy: ROT: rotation SEN: sequential (FILO) PO: load optimization 0-00: output load -= output used as normally closed stage -= output used as normally opened stage MLS 3 0 / 30 min Minimum off time LRT 60 0 / 0 min Rotation enable time DPU 0 / 0 min Start up delay SCD 40 0 / 00 % Scaling down: maximum output capacity on alarm Threshold Alarm Settings ALA (RLO) / AHA bar or C Alarm low threshold AHA 35 ALA / 0 (RHI) bar or C Alarm high threshold AID 30 0 /0 min Alarm delay

14 4 PB_ER65_Preliminary Ordering Codes All ordering codes are relative to individual product package. All items are also available with bulk pack (i.e. quantity of 0 controllers). Please refer to JC customer service. Controllers ER65-DR30-00C Controller, DIN Rail mount, NOpen, removable plug connectors ER65-DR30-50C Controller, DIN Rail mount, MODBUS, removable plug connectors Accessories & Spare parts ER-NTC-0C NTC Sensor, m, universal replacement T T ER-NTC-C ER-NTC-C NTC Sensor, m, T replacement NTC Sensor, m, T replacement T T ER-COM-C RS485 cable,.5 m, RJ connector, 8 wires ER-TER-3C Spare parts, removable plug connectors kit Technical Specification Product Codes Power Requirements ER65-DR30-xxC 30 VAC/VDC ±0%, 50/60 hz, 3 W Protection Class Ambient Operating Conditions IP0 Range -40 to 0 C -0 C to 50 C 5 to 80% RH (non-condensing) Accuracy Sensor /- K NTC, P499 Relay Outputs see figure Dimensions see figure Compliance Johnson Controls, Inc., declares that these products are in compliance with the essential requirements and other relevant provisions of the EMC Directive 004/08/EC and Low Voltage Directive 006/95/EC. Building Efficiency Headquarters: Milwaukee, Wisconsin, USA Branch Officies: Principal Cities World-wide Metasys and Johnson Controls are registered trademarks of Johnson Controls, Inc. All other marks herein are the marks of their respective owners. 00 Johnson Controls, Inc. Published in Europe